package com.zf.mall.redis.configure;

import java.nio.charset.Charset;

import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import org.springframework.util.Assert;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;

public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {

	private ObjectMapper objectMapper = new ObjectMapper();
	
	public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
	
	private Class<T> clazz;
	
	static {
		ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
	}
	
	public FastJson2JsonRedisSerializer(Class<T> clazz) {
		super();
		this.clazz = clazz;
	}
	
	
	@Override
	public byte[] serialize(T t) throws SerializationException {
		if(t == null) {
			return new byte[0];
		}
		return JSON.toJSONString(t,SerializerFeature.WriteClassName).getBytes();
	}

	@Override
	public T deserialize(byte[] bytes) throws SerializationException {
		if(bytes == null || bytes.length < 1) {
			return null;
		}
		String str = new String(bytes, DEFAULT_CHARSET);
		
		return JSON.parseObject(str,clazz);
	}
	
	
	public void setObjectMapper(ObjectMapper objectMapper) {
		Assert.notNull(objectMapper , "'objectMapper' must not be null");
		
		this.objectMapper = objectMapper;
	}
	
	protected JavaType getJavaType(Class<?> clazz) {
		return TypeFactory.defaultInstance().constructType(clazz);
	}
	

}
